Abstract
Quantum-chemical calculations using the CNDO/2 method are applied to radicals produced by cleaving hydrogen from the DNA bases adenine, guanine, cytosine, and thymine. The resulting sequences of occupied molecular orbitals show that the loss of a hydrogen atom in most cases leads to the loss of one π electron. Consequently the π electron part of the energy-loss spectra will change considerably. In view of this, it is possible that the change of the electron energy-loss spectra due to irradiation, as observed by Isaacson et al., might be caused by the loss of hydrogen atoms. Such damage does not influence the electron-microscopical image appreciably, as long as no deleterious secondary processes are initiated.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
